Dielectric Permittivities of RocksΒΆ

Material

\(\varepsilon_r\;\)

Shales

5 - 15

Sandstones (dry)

2 - 3

Sandstones (wet)

5 - 10

Limestones

4 - 8

Granite

4 - 6

Coal (dry)

3.5

Coal (wet)

8